Slip-jaw wrench



Patented Sept. 20, 1921.

M. 4l. G'INSBUHG.

SLIP JAW WRENCH.' APPLICATION msn ^Pn. 2. 1919. RENEwEn f E'a. 11,1s2r.

2 k... A 5 s n l l lll-ULI. n "Mm" N x i ficationl To ,all lwhom 'it ma UNITED STATES III-enum I. .GINSBUBQ or rIImADELPHIA, IuaNNs'szLvANIA.,l i

SLIPJAW WRENCH.

c Specication of Letters Patent. Patntediept, 1921, i

Application med piu 2, 1919, seriai No. 286,919. nenewearebruary rr, 192'1. serial No. 445,854.

conce'mzg n Be it known that MICHAEL I. GINSBRG, a citizenof the United States residing at Philadelphia, in the County of `Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Slip-Jaw Wrenches, of which the following is a speci- My invention relates to a new and useful improvementh in slip jaw wrenches, and hasV forits object to so construct a wrench of this description that while it will take the vsame hold upon a nut, bolt head or the like when turned in one direction, will automatically release its holdupon the object when swung in the reversed direction.

A further 'object vof my invention is to provide novel and effective means for automatically locking the adjustable jaw, and

A still further object of my invention is to so combine this locking means with the mechanism for adjusting the sliding jaw that said jaw will be lockedy or released by the ordinary manipulation of the handle.

With these ends in view, this Vinvention consists in the details of construction and combination of elements, hereinafter set forth, and then specifically designated by the claim. n

In order that those skilled in thel art to which this invention appertains, may understand how to make and use the same, I

will describe its construction in detail, re.

ferring by numerals to the accompanying drawings forming a part of this application, in which Figure 1, is'a top edge view of a wrench made in accordance with` myk improvement.

Fig. 2, is a side elevation of the wrench, the major portion of the stationary jaw and its shank being broken Vaway to clearly show the mechanism.

Fig. 3, is a detail view of the adjusting nu, its bushing and pintle upon which they sli e.

Fig. 4, is a view similar to Fig. 2 showing the handle and mechanism in the position assumed during the reverse movement, and

Fig. 5, is a bottom edge view of the wrench.

In carrying out my invention as here embodied, 1 represents the head of the wrench with which is formed the stationary jaw ..2 and the shank 3, and in this head is formed a suitable channel way 4 in which slides the tail piece 5 of the movable jaw 6, the tail Y vU'Ifhe intle 10 "passes through piece and jawbeing formed in one piece.

Upon the rear .edge of the tail piece .is

ternally threaded vcap 13; bothj the enlarged portion *ofthe* pintle and the cap' being slotted for the reception of a screw (clriver vto facilitate the assembling ofthe evlce. i

A9 of t e adjusting nut an A shoulder 14 into the recess 15 in which is located the coil spring 16, so that this spring will be confined between the shoulder and the cap 13 when the latter is threaded upon the pintle, thereby pintle and adjustin position shown in ig. 2, and as the tail piece of the movable jaw meshes with said nut this movable jaw will also be normally held in the position shown in Fig. 2.

17 represents the handle of the wrench,

the inner end of which projects into the recess 18 formed in the shank 3 and is pivoted therein at 19 so as to have a limited swinging movement independent of the body of `the wrench.

2O represents a locking dog which is pivoted at 21 to the inner end of the handle at a suiicient distance from the pivot pointJ 19 to cause it to have sullicient movement to slide'back and forward through the guideway 22, its innerend passing beneath the head of the bushing 9 when the handle is in the position shown in Fig. 2 and passing from beneath said head when the handle is in the position shown in Fig. 4 for the purpose hereinafter set forth.

From this description the operation of my improved wrench will lbe obviously as follows The movable j aw. may be adjusted by the revolving of the adjusting nut 8 so as to adapt the jaws of the wrench to any size nut or bolt head or other work within-its limit.

When by applyin drawing upon the handle in the direction of the arrow in Fig. 2 the power may be applied to ,set up 0r beek Q ff the mi@ t9 the' bushing through *the normally holding the nut in the elevated the jaws to a nut and l which thevjaws are applied, since the locking dog prevents the downward movement f the ad'usting nut 8 and consequently the:

sliding o the movable jaw 6.

When it is desired to take a new hold .upon the .nut vor other work, aV reversed movementof the handle will draw the locking dogv from beneath vthe bushing 9 and permit thevmovable j awto slide away from the stationary jaw, drawing down theadjustingnut and compressing 'the spring 16. Thus y1 t.will be seen that the wrench` will have the effect of a ratchet wrenchsince the jaws will be permitted to slide over the largest diameter ,ofy the nut to which 'it is applied when taking a fresh. hold thereon and .yetfbesecurely held upon the smaller diameter when this ynut is being turned.v

If found desirable the shank 3 f'may be eX- tended to form a handle and a separate le-V ver givoted thereto for actuating the locking) og.4 v l l Y f course I ydo not wish to be limited to .e the ,exact details of construction as' herein Y -y shown, as these may be varied within the limits of the appended claim without dethe, tail piece, an adjusting nut meshin with `said sectional thread, a bushing fitte tothe adjusting'nut, a sliding pintle passthe adjusting nut, a cap-secured upon one end of the pintle, shoulders vv`vformed within the head, a spring confined between said cap and shoulders, a handle pivoted within the Ving` through the head and the bushing of shank, and a lookingjboltvpivoted to the handle in such manner as to pass into and.v out of engagement with the bushing of the adjusting nut when the handle vis swung to andfro. .7

Ilnftestimon'y whereof, I have hereunto aiXedmy-'si nature.'

I CHAEL dI. GINSBURG. 

